Expand using suitable identity (3a-5b+4c)2?
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Agrima Gupta 4 years, 1 month ago
Identity- (a+b+c)2=a2+b2+c2+2ab+2bc+2ca
(3a)2+(-5b)2+(4c)2+2x3a x (-5b)+2x (-5b)x4c+2x3a x 4c
answer= 9a2+25b2+16c2-30ab-40bc+24ac
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